Mold for culverts.



` WALTER ...ToriivstioN, orsdripsnnimgarasarrn. f

MOLDFOB @MEETS-ff AApplicationfiled{lVIay27, 1916.` -ASIval-'Noi 100,277.v 7 v' T0 all ywhom z'tfmay concern:

:Be it 1 known that I, Ivan/TER JoHNs# 'roma citizen ofthe YUnited `States,lresid ing l at Gadsden, in the county -1of -Etowah and State of Alabama, haveinvented cerviding means'for dropping'this formv afterl the' arch has set and rer'novingv it 'longitudinallyffrom the culvert for use at another place. 'Small culvertsvas under roadways or the like will be Ibuilt* by@l this Yapparatus when the latter i is made in sections; 'from two to siX being necessary l"for a -ciilvert under the ordinary roadway, according to the length :ofthe y`sectjioiis and the Vwid-th ofthe roadway. I/Vhile these c ulverts are generally built before lthe fill vis. made to carry the road'over: the stream being arched,

it is quite possible to use my improved mold when forming a culvert 1n a tunnel; and

accordingly I reserve all rights to the use of this invention in any way of which it is susceptible. In the following specification I have described two working constructions as perhaps most practical of several types which my invention may take, and referring to the accompanying drawings:

Figure l is a cross section of a type of my invention, and Fig. 2 is a section on the line 4 4 of Fig. l. I

The invention aims at the provision of a support which will sustain the upper part or shell of the form from the floor of the culvertuntil the arch has set, after which the support can be collapsed by moving it radially toward the center of the form to permit the latter to drop, and then the form and its support can be removed for further use. I have. shown the form as nearly semicircular over its top, but would not be limited at all in respect to the shape` of the same; and obviously the sizes, proportions and materials of parts are not essential.

In the type of my invention shown, slats 21 are carried by ribs 22 which are braced at intervalsby transverse templets 23. l.In this f typev` theregisbut a singlenshaft vv130 mounted lin 'bearings through the 'templets, and near each end it carries a wheel ort-disk 31 provided with holes 32 and'finto' one of which a pinf33 may be". passed for looking *tup stems "-.ATENE @FHM l :specification of Lettcrs'gatut. i ,d

the mwheel to the -teinplet 231 yPivotall-y f mountediin certain of said-ih o'les'as'at= 34 are two telescopici bars, eachy made up rofga pair ofl rods y or `straps 1 35 which-. 'haveper- 1 foratedfbodie's f lapping feach other .andwcon-f Y ne'cted` bylbolts 36, .and "it :isfobviousthatwhen the shaft yis turned `its 'crank wheelfl will movey these bars'asmaybe necessary. At eachend ofthe templet `is a 4plate25 having a horizontal slot 26' in .which is mo'unteduslidably avpi'n27, and the numeral 28desig`nates' a link having,v in its upper end a slot ,29`loosely mountedon 'said pin. The.- support for the formi "in this type of my invention is the stripv or .shim=38,`=herein. shown as of channel iron interposed 'be-v tweenvthe lowermo'stslat 24 andthe sill 37, and soi long asfthesestrips aref in place they support :the shell fro-mi' the lsillj or .f sills asi will @be/clear. l Attachedito eachJstripznat each :fendf` thereof is an angle rironf v4'5 fto which the lower end of thel link 28 is pivoted at 46, and to which the loweriend' of A'oneof the bars is pivoted at 47.

In the use of this type of my invention the sills are laid longitudinally of the culvert to be formed, the shaft isy turned so thatthe wheels 3l cause the bars to swing Meanwhile the link 28 moves upward as its slot 29 permits and the pin 27 moves inward as the slot 26 permits; but continual turning of the main shaft draws the swinging supports so lfar inward that they no' vlonger sustain the lower slats 24 from the sills 37. The form is then tapped to disengage its cling from the arch, and it drops' onto the sills and may be removed longi-y tudinally from the finished culvert and used elsewhere. v

90 the strips 38 outward, and the shell is f I have swinging supports Ywhich move inward from beneath the lowermost slats 24: but do not become disconnected from the mold; and in any form of my invention the mold is drawn longitudinally out of the finished culvert and used again. l avoid the necessity for Vshoring or for the use of wedges or jacks, and it is not necessary that any workman crawl or reach into the form or the culvert. The desirability of makingthe sections of suoli size that they can be readily handled will be apparent.

What I claim is:

l. In a collapsible mold for culverts, etc., a core-box with a rigid shell structure adapted'to be placed in position upon a foundation, a ,crank shaft mounted longitudinally within and on'the core-box, a pair of shims adjustable beneath the edges of the shell structure, and adjustable cone nections between said shaft and the shims.

2. ln a mold for culverts or the like, a collapsible core comprising a form for the arch, transverse braces for the form, longitudinally extending, inwardly movable supports positioned beneath the lower edges of the form, and a shaft mounted in the braces having means connecting the supports and said shaft to withdrawrthe supports from engagement with the core by rotation ofthe shaft.

3. In a4 mold for culverts and the like, the combination with the core made in sections and including transverse templets near its ends, and a pair of sills; of` a shaft journaled through said templets, strips resting on said sills beneath the edges of the core, wheels on said shaft, bars connecting crank pins in said wheels with said strips for drawing the latter inward over the sills, and swinging connections between the strips and templets, for the purpose set forth.

4. ln a mold for culverts and the like, the combination with the core made in sections and including transverse templets near its ends, and a pair of sills; of a shaft journaled through said templets, strips resting on said sills beneath the edges of the core, wheels on said shaft, bars connecting crank pins in said wheels with said strips for drawing the latter inward over the sills, a plate carried by each end of the templet and having a horizontal slot, a link pivoted to each strip and having a longitudinal slot,

and a pin slidable in both slots and loosely connecting the plate and link, for the purpose set forth. y

5. ln a mold for culverts and the like, the combination with an arch form having templets across its interior, a shaft journaled through the templets, wheels fast on said shaft and each having a pair of crank pins, and telescopic bars each pivoted at its inner end on one of said pins; of sills under the edges of the arch, a strip between each sill and the edge of the arch above it, a swinging support between the strip and templets, and pivotal connections between the outer ends of the baars and strips, for the purpose set forth.

In testimony whereof I afliX my signature.

WALTER w. JoHNsToN.

f Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 5. 

